圆管内微生物与颗粒混合污垢特性的实验研究  

Experimental Study on the Mixed Fouling Characteristics of Microorganisms and Particles in a Tube

作　　者：徐志明[1] 郑伟超 王景涛[1] 王宇航[1] Xu Zhiming Zheng Weichao Wang Jingtao Wang Yuhang(Energy Resources and Power Engineering College, Northeast Electric Power University ,Jilin Jilin 132012)

机构地区：[1]东北电力大学能源与动力工程学院,吉林吉林132012

出　　处：《东北电力大学学报》2017年第5期44-50,共7页Journal of Northeast Electric Power University

基　　金：国家自然科学基金项目(51476025)

摘　　要：为了探讨纳米氧化镁颗粒与铁细菌混合物在圆管中的污垢特性,对混合污垢与单一污垢、不同纳米氧化镁浓度、铁细菌浓度、流速下不锈钢圆管中的污垢特性进行了实验研究,采用热阻实时监测、微观结构观察、静置实验等检测手段研究了影响污垢形成的因素。结果表明:混合污垢的污垢热阻渐近值最大,其次为单一纳米氧化镁污垢,铁细菌形成的污垢渐近值最小且污垢热阻经历最长时间才达到稳定;混合污垢热阻渐近值随颗粒浓度、铁细菌浓度的增加而增加,并且增加幅度呈现变缓的趋势;结垢速率与流速有关,流速大结垢速率小,热阻小,达到稳定时间长。In order to study the mixed fouling characteristics of Nano Magnesium Oxide and iron bacteria in a tube,experimental study was carried out on the characteristics of fouling in stainless steel tubes with mixed fouling and single fouling, different concentrations of Nano Magnesium Oxide, iron bacteria concentration and flow rate. By means of real-time monitoring of thermal resistance, micro structure observation, static test and so on to study the factors that affect the formation of fouling. The results show that ： the asymptotic value of fouling resistance of mixed fouling is the largest, following by the single Nano Magnesium Oxide fouling, however the asymptotic value of fouling resistance of iron bacteria is the minimum also it has the longest time to reach stability;The asymptotic value of fouling resistance of mixed fouling increased with the increase of the particle concentration and the concentration of iron bacteria, and there is a slowing down trend of this phenomenon ; The fouling rate is related to the flow rate, the flow rate is small, the thermal resistance is small, and the stable time is long.

关 键 词：混合污垢 纳米氧化镁 铁细菌 污垢特性 

分 类 号：TK124[动力工程及工程热物理—工程热物理]